The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 2010
Filed:
Aug. 03, 2007
Applicants:
Hari Babu Sunkara, Hockessin, DE;
Hiep Quang DO, Hillsborough, NJ (US);
Inventors:
Hari Babu Sunkara, Hockessin, DE;
Hiep Quang Do, Hillsborough, NJ (US);
Assignee:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 43/11 (2006.01);
U.S. Cl.
CPC ...
Abstract
Processes for reducing color in PO3G are provided. The processes include contacting PO3G with an activated carbon and then separating the PO3G from the activated carbon by, for example, filtration. The process provides PO3G having an APHA color less than that before contact with the absorbent. The processes are desirably used for polymers having a molecular weight of about 250 to about 5000.
Sunkara, Hari. (2010). Processes for reducing color in polytrimethylene ether glycol polymers (U.S. Patent No. 7745668). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7745668
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile